Atmosphere roller kiln cooling device

Abstract

The utility model belongs to the technical field of roller kiln cooling, particularly relates to an atmosphere roller kiln cooling device, and aims to solve the problems that existing equipment cannot form fixed internal airflow disturbance and material dust can form airflow flying dust to block a heat exchanger, and adopts the technical scheme that the atmosphere roller kiln cooling device comprises an air inlet connected with an air outlet pipeline; one end of the air outlet pipeline is connected with a dust removal device, the exhaust end of the dust removal device is connected with a cooling assembly, the air inlet end of the cooling assembly is communicated with the dust removal device, the exhaust end of the cooling assembly is connected with a fan, the air inlet end of the fan is communicated with the cooling assembly, and the exhaust end of the fan is connected with an air return device; hot atmosphere in the roller kiln is cooled by external circulation through the device, integral airflow circulation of high-temperature atmosphere in the roller kiln is formed, the heat exchange cooling efficiency is greatly improved with high efficiency and low cost, the cooling capacity of the roller kiln is improved, the performance and yield of materials are guaranteed, meanwhile, the energy consumption of the roller kiln is reduced to a certain extent, and the energy consumption of the roller kiln is reduced to a certain extent. The production cost is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of atmosphere roller kiln cooling devices, belong to roller kiln cooling device technical field. BACKGROUND

[0002] As the core material of lithium battery, lithium iron phosphate positive electrode material and graphite negative electrode material promote the key of the healthy and rapid development of lithium battery industry by improving the electrochemical performance and production technology. At present, the production mode of positive and negative electrode materials of lithium battery is basically through high-temperature atmosphere roller kiln continuous sintering. According to the process requirements of such materials, the materials need to be cooled to a reasonable temperature after high-temperature sintering to achieve qualified quality.

[0003] At present, the active cooling mode of atmosphere roller kiln usually has finned tube water cooling, kiln body jacket air cooling and other forms. Based on the current competition of lithium battery industry, the trend of increasing production, reducing cost and increasing efficiency, the sintering time of materials is required to be shortened continuously, and the unit sintering amount is required to be increased continuously. Under the conventional cooling mode, the actual cooling effect will be greatly reduced, which cannot meet the process and quality requirements.

[0004] In the prior art, a kind of kiln cooling device is disclosed in the utility model patent with announcement number CN220771913U. The kiln cooling device includes a kiln body, a cooling air inlet assembly, the cooling air inlet assembly is arranged at the top of the hearth of the kiln body, and one end of the cooling air inlet assembly extends out of the kiln body; a heat exchanger is arranged outside the kiln body, and one end of the heat exchanger is connected with one end of the cooling air inlet assembly extending out of the kiln body; a return air assembly is arranged at the bottom of the hearth, and one end of the return air assembly extends out of the kiln body and is connected with the other end of the heat exchanger. The patent forms an internal up-down fixed airflow in the kiln by the combined action of the external plate heat exchanger, the fan and the matching pipeline, to replace the traditional kiln body interlayer air cooling and finned tube water cooling. This method considers setting one or more circulating systems according to requirements, which cannot form fixed internal airflow disturbance; at the same time, the method does not consider that material dust will form airflow dust raising when manufacturing internal atmosphere disturbance and airflow circulation, which poses a risk to the external plate heat exchanger; in addition, except for this circulating heat exchange cooling mode, the roller kiln does not have other active cooling devices, so that when the plate heat exchanger is blocked, equipment accidents and other adverse conditions will occur.

[0005] Therefore, in order to solve the above-mentioned actual problems existing in the cooling of atmosphere roller kiln, the present application adopts to strengthen the overall atmosphere disturbance in the kiln, to form the overall front and rear airflow, and to take out the heat through the external cooling device, which not only improves the cooling capacity, but also does not increase the process gas consumption. SUMMARY

[0006] The utility model discloses to solve the problem that the prior art cannot form fixed internal airflow disturbance and material dust will form airflow dust raising and block the heat exchanger, and provides a kind of atmosphere roller kiln cooling device.

[0007] The utility model discloses a following technical scheme to realize above-mentioned purpose: an atmosphere roller kiln cooling device, including air inlet, air inlet sets up at the top of roller kiln, and air inlet is connected with the air outlet pipeline, and the top of roller kiln is communicated with one end of air outlet pipeline, and the other end is connected with dust collector, and the air inlet of dust collector is communicated air outlet pipeline, and the air outlet of dust collector is connected with cooling assembly, and the air inlet of cooling assembly is communicated with dust collector, and the air outlet of cooling assembly is connected with fan, and the air inlet of fan is communicated with cooling assembly, and the air outlet of fan is connected with return air device;

[0008] The return air device includes a return air duct and a return air inlet, one end of the return air duct is communicated with the air outlet of the fan, and the other end is communicated with the return air inlet; the return air inlet is provided with a plurality of return air inlets, and the plurality of return air inlets are arranged at the bottom of the roller kiln and are communicated with the roller kiln.

[0009] The dust collector includes a dust removal box and dust removal partitions, and the dust removal partitions are evenly distributed in the dust removal box in an up-down manner, and the dust removal partitions are not interfered with each other.

[0010] As a further scheme of the utility model: the dust removal box is evenly distributed with a plurality of slots on the side wall, and the dust removal partitions are inserted into the slots; the top of the dust removal box is provided with a top cover, and the top cover is detachably mounted on the top of the dust removal box.

[0011] As a further scheme of the utility model: the cooling assembly includes a cooling box, and the side wall of the cooling box is provided with a cooling medium inlet and a cooling medium outlet.

[0012] As a further scheme of the utility model: the cooling medium inlet is located below the cooling box, the cooling medium outlet is arranged above the cooling box, and the cooling medium is the process gas of the atmosphere roller kiln.

[0013] As a further scheme of the utility model: the cooling box is provided with a conduction device, one end of the conduction device is communicated with the cooling medium inlet, and the other end is communicated with the cooling medium outlet.

[0014] As a further scheme of the utility model: the conduction device is a cooling pipe or a cooling clamp plate.

[0015] As a further scheme of the utility model: the air outlet pipeline is provided with an extension tube, and the extension tube is a flexible hose.

[0016] As a further scheme of the utility model: the air outlet pipeline is provided with a pipeline adjusting valve and a cooling adjusting valve, and the cooling adjusting valve is arranged between the cooling assembly and the fan.

[0017] As a further scheme of the utility model: the top of the roller kiln is provided with a plurality of air inlet cover plates, each air inlet cover plate is provided with a plurality of air inlets, the a plurality of air inlets are communicated with air outlet pipes, and each air outlet pipe communicated with the air inlet cover plate is provided with a pipe adjusting valve.

[0018] As a further scheme of the utility model: the bottom of the dust removal device, the cooling assembly and the fan is provided with a supporting part, and the dust removal device, the cooling assembly and the fan are fixed on the top of the roller kiln through the supporting part; and the bottom of the supporting part is provided with a shock-absorbing block.

[0019] The utility model discloses the beneficial effect is:

[0020] 1. In the utility model, the hot atmosphere in the roller kiln passes through the whole function of pipeline, dust removal device, cooling assembly, fan and air return device in turn, adopts external circulation cooling, forms the airflow circulation of high-temperature atmosphere whole in the roller kiln, and the cooling efficiency of heat exchange is greatly improved with high efficiency and low cost, the cooling capacity of the roller kiln is improved, the performance and yield of material are guaranteed, and the energy consumption of the roller kiln is reduced to a certain extent, and the production cost is reduced.

[0021] 2. In the utility model, the cooling medium is atmosphere roller kiln process gas, the process gas is usually liquid vaporization nitrogen or oxygen, and the temperature is usually set to about 10 DEG C, therefore, combining the process atmosphere condition of the atmosphere roller kiln and the cooling demand of the device, the process atmosphere can also be input into the roller kiln, cooled by the cooling assembly, and the process atmosphere is heat-exchanged and heated to preheating atmosphere through cooling medium outlet 13, and then input into the heating section of the roller kiln, so that the amount of the atmosphere of the roller kiln is not increased, and the energy consumption of the heating section of the roller kiln is reduced.

[0022] 3. In the utility model, the dust separation plates are evenly arranged in the dust removal box, and the dust separation plates can avoid the material powder in the atmosphere from blocking the heat exchanger during long-term use, thereby affecting the use effect of the system.

[0023] 4. In the utility model, the dust removal box is provided with the insertion slot on the side wall, and the dust separation plate is inserted into the insertion slot; the top of the dust removal box is provided with a top cover, and the top cover is detachable; and the insertion slot and the top cover are arranged to facilitate the maintenance and replacement of the dust separation plate.

[0024] 5. In the utility model, the air outlet pipe is provided with a pipe adjusting valve and a cooling adjusting valve, the cooling adjusting valve is arranged between the cooling assembly and the fan, and the adjusting valve can adjust the air volume and the air inlet rate according to the specific heat demand.

[0025] 6、The utility model discloses, the telescopic pipe is arranged on the air inlet pipeline, and the telescopic pipe is collapsible hose, when the hot atmosphere in the pipe reaches certain pressure, the telescopic pipe expands laterally, and the pipeline length is increased to increase the content volume of the pipe, and the telescopic pipe can reduce the expansion of the pipeline after heat transfer by the hot atmosphere, guaranteeing the assembly stability of the device.

[0026] 7、The utility model discloses, the cooling medium import is located below the cooling box body, and the cooling medium export is arranged on the cooling box body top, and this setting can make the cooling medium as long as possible in the cooling box body stays, thereby enhancing the cooling effect of cooling medium.

[0027] 8、The utility model discloses, dust removal device, cooling assembly and fan bottom are all provided with support part, and the bottom of support part is provided with shock pad, and shock pad is used for reducing mechanical vibration and the resonance of airflow, thereby increasing the service life of the device. DRAWINGS

[0028] Figure 1 It is the whole structure schematic diagram of the utility model;

[0029] Figure 2 It is the dust removal device side view structure schematic diagram of the utility model;

[0030] Figure 3 It is the cooling assembly rear view structure schematic diagram of the utility model;

[0031] Figure 4 It is the cooling assembly top view structure schematic diagram of the utility model embodiment three.

[0032] In the drawing: 1, cooling assembly;11, cooling box body;12, cooling medium import;13, cooling medium export;14, cooling regulating valve;15, conduction device;2, dust removal device;21, dust removal box body;22, dust removal baffle;23, top cover;3, air outlet pipeline;31, air inlet cover plate;32, pipeline regulating valve;33, telescopic pipe;34, air inlet;4, fan;41, air return pipeline;42, air return;5, support part. DETAILED DESCRIPTION

[0033] The technical scheme in the embodiments of the utility model will be described clearly and completely below in combination with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model and not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the utility model.

[0034] Embodiment one

[0035] As Figure 1As shown, an atmosphere roller kiln cooling device includes an air inlet 34, which is arranged on the top of the roller kiln, the air inlet 34 is connected to the air outlet duct 3, one end of the air outlet duct 3 is connected to the roller kiln, and the other end of the air outlet duct 3 is connected to a dust removal device 2, the air inlet end of the dust removal device 2 is connected to the air outlet duct 3, the dust removal device 2 is used to remove dust in the roller kiln, the exhaust end of the dust removal device 2 is connected to a cooling component 1, the air inlet end of the cooling component 1 is connected to the dust removal device 2, and the cooling component 1 is used to cool the hot atmosphere in the air outlet duct 3; the exhaust end of the cooling component 1 is connected to a fan 4, the air inlet end of the fan 4 is connected to the cooling component 1, and the exhaust end of the fan 4 is connected to the return air device, and the fan 4 is used to draw the high-temperature atmosphere inside the roller kiln into the device and discharge the cooled airflow into the roller kiln;

[0036] The return air device includes a return air duct 41 and a return air outlet 42. One end of the return air duct 41 is connected to the exhaust end of the fan 4, and the other end is connected to the return air outlet 42. There are several return air outlets 42, and several return air outlets 42 are arranged at the bottom of the roller kiln. The return air outlets 42 are connected to the roller kiln. The number and distribution of the return air outlets 42 are set according to the cooling requirements of the material in the roller kiln, so that the return air is more uniform.

[0037] The dust removal device 2 includes a dust removal box 21 and a dust removal partition 22. Several dust removal partitions 22 are evenly distributed up and down in the dust removal box 21, and the several dust removal partitions 22 do not interfere with each other; the hot atmosphere enters the dust removal device 2 through the air outlet duct 3, and the hot atmosphere passes through the dust removal partition 22 and flows out from the other end of the dust removal box 21. The dust removal partition 22 can make the material powder entrained in the atmosphere be adsorbed on the dust removal partition 22, so as to avoid long-term use clogging the cooling device and affecting the use effect of the cooling device.

[0038] Example 2

[0039] Improvements based on Example 1:

[0040] like Figures 1 to 3 As shown, slots are evenly distributed on the upper and lower side walls of the dust removal box 21, and the dust removal partitions 22 are inserted into the slots; a top cover 23 is provided on the top of the dust removal box 21, and the top cover 23 is detachably installed on the top of the dust removal box 21. The top cover 23 facilitates the maintenance, repair and replacement of the dust removal partition 22, and can prevent the material powder entrained in the atmosphere from clogging the cooling device during long-term use, thereby affecting the use effect of the cooling device.

[0041] The cooling assembly 1 includes a cooling box body 11 , and a cooling medium inlet 12 and a cooling medium outlet 13 are provided through the side wall of the cooling box body 11 . The cooling medium inlet 12 and the cooling medium outlet 13 are used for injecting and discharging the cooling medium.

[0042] Further, the cooling medium inlet 12 is located below the cooling box 11, and the cooling medium outlet 13 is arranged above the cooling box 11, so that the cooling medium can stay in the cooling box 11 for as long as possible, thereby enhancing the cooling effect of the cooling medium.

[0043] Further, the cooling medium is the process gas of the atmosphere roller kiln, and the process gas of the atmosphere roller kiln is usually liquid vaporized nitrogen or oxygen, and the temperature of the process gas is usually set to about 10°C. Therefore, in combination with the process atmosphere of the atmosphere roller kiln and the cooling demand of the device, the process atmosphere of the roller kiln can also be introduced.

[0044] Further, while being cooled by the cooling assembly 1, the process atmosphere is heat-exchanged and warmed into preheated atmosphere through the cooling medium outlet 13, and then introduced into the warming section of the roller kiln, without increasing the amount of the atmosphere of the roller kiln, thereby achieving the effect of reducing the energy consumption of the warming section of the roller kiln.

[0045] The air outlet pipeline 3 is provided with an extension pipe 33, which is a flexible hose. When the hot atmosphere in the pipe reaches a certain pressure, the extension pipe 33 expands laterally to increase the length of the pipeline and the volume of the pipe, and the extension pipe 33 is used to reduce the expansion of the air outlet pipeline 3 after being heated by the hot atmosphere, thereby ensuring the stability of the cooling device.

[0046] The air outlet pipeline 3 is provided with a pipeline adjusting valve 32 and a cooling adjusting valve 14. The cooling adjusting valve 14 is arranged between the cooling assembly 1 and the fan 4, and the pipeline adjusting valve 32 and the cooling adjusting valve 14 can adjust the air volume and the air inlet rate according to the specific heat demand.

[0047] Further, the top of the roller kiln is provided with a plurality of air inlet cover plates 31, each of which is provided with a plurality of air inlets 34, and the plurality of air inlets 34 are communicated with the air outlet pipeline 3. Each air outlet pipeline 3 communicated with the air inlet cover plate 31 is provided with a pipeline adjusting valve 32, which is used to adjust the air outlet of the current air inlet cover plate 31, and the plurality of air inlet cover plates 31 can make the hot air in the roller kiln be extracted more uniformly.

[0048] The dust removal device 2, the cooling assembly 1 and the fan 4 are all provided with support components 5, and the dust removal device 2, the cooling assembly 1 and the fan 4 are fixed to the top of the roller kiln through the support components 5. The bottom of the support component 5 is provided with a damping block, which is used to reduce the mechanical vibration and the resonance generated by the airflow, thereby increasing the service life of the device.

[0049] Example Three

[0050] Based on the improvement of Example Two:

[0051] As Figure 4As shown, a conduction device 15 is provided in the cooling box 11. The conduction device 15 can be a cooling pipe or a cooling splint, etc. One end of the conduction device 15 is connected to the cooling medium inlet 12, and the other end is connected to the cooling medium outlet 13. The cooling medium moves in the cooling pipe or the cooling splint and does not mix with the roller kiln gas. The setting of the conduction device 15 is suitable for the cooling medium being cooling water or non-roller kiln process gas, and the cooling medium being 32°C circulating cooling water or 7-12°C circulating chilled water, etc.

[0052] In summary, the workflow of this utility model is as follows:

[0053] like Figures 1 to 4 As shown, when in use, the cooling medium inlet 12 and the cooling medium outlet 13 are connected, and the fan 4 is turned on; the hot atmosphere inside the roller kiln is sucked by the fan 4 and enters the air outlet duct 3 from the roller kiln through the air inlet 34. During operation, the pipeline regulating valve 32 is adjusted according to actual needs to adjust the air outlet volume of the air outlet duct 3; the hot atmosphere enters the dust removal device 2 through the dust removal baffle 22 to block the material powder entrained in the atmosphere, and then enters the cooling component 1 through the air outlet duct 3. At this time, the cooling medium inlet 12 is injected with cooling medium, and the cooling medium exchanges with the hot atmosphere; in Example 3, the cooling medium does not exchange with the hot gas, and the atmosphere is cooled by heat conduction. At the same time, the cooling regulating valve 14 is adjusted to adjust the air outlet volume of the cooled atmosphere; the cooled atmosphere enters the return air duct 41 through the fan 4, and is then re-injected into the roller kiln through the return air outlet 42;

[0054] The roller kiln cooling device adopts external circulation cooling. The hot atmosphere inside the roller kiln is circulated and cooled in sequence through the air outlet duct 3, dust removal device 2, cooling component 1, fan 4 and return air device, forming an overall air flow circulation of the high-temperature atmosphere in the roller kiln, greatly improving the heat exchange cooling efficiency, improving the cooling effect of the roller kiln, ensuring the performance and yield of the materials, and at the same time, reducing the energy consumption of the roller kiln to a certain extent, reducing production costs.

[0055] However, as those skilled in the art are familiar with, the working principles and wiring methods of the fan 4 and the shock-absorbing block are commonplace and are conventional means or common knowledge, and will not be elaborated here. Those skilled in the art can make any selections according to their needs or convenience.

[0056] It is apparent for a person skilled in the art that the present application is not limited to the details of the above-described exemplary embodiments, but that it can be implemented in other concrete forms without departing from the spirit or the essential characteristics of the present application. Therefore, the embodiments should be considered as exemplary and non-limiting, the scope of the present application being defined by the claims appended hereto rather than by the above description, and all the changes which fall within the meaning and the scope of the equivalent elements of the claims are intended to be embraced therein. Any reference signs in the claims should not be construed as limiting the claims to the figures in which the reference signs are used.

[0057] Furthermore, it should be understood that although the present specification describes exemplary embodiments, not every embodiment contains only one independent technical solution, and the present specification is described in this way only for the sake of clarity, and a person skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that a person skilled in the art can understand.

Claims

1. An atmosphere roller kiln cooling device, comprising an air inlet (34) arranged at the top of the roller kiln, an air outlet duct (3) connected to the air inlet (34), characterized in that, The air outlet pipeline (3) is communicated with the top of the roller kiln at one end, and is connected with a dust removal device (2) at the other end. The air inlet end of the dust removal device (2) is communicated with the air outlet pipeline (3), the air outlet end of the dust removal device (2) is connected with a cooling assembly (1), the air inlet end of the cooling assembly (1) is communicated with the dust removal device (2), the air outlet end of the cooling assembly (1) is connected with a fan (4), the air inlet end of the fan (4) is communicated with the cooling assembly (1), and the air outlet end of the fan (4) is connected with a return air device. The return air device comprises a return air pipeline (41) and a return air port (42). One end of the return air pipeline (41) is communicated with the air outlet end of the fan (4), and the other end is communicated with the return air port (42). The return air port (42) is provided with a plurality of return air ports (42), and the plurality of return air ports (42) are arranged at the bottom of the roller kiln and are communicated with the roller kiln. The dust removal device (2) comprises a dust removal box body (21) and a dust removal partition plate (22). A plurality of dust removal partition plates (22) are evenly distributed in the dust removal box body (21) in an up-down direction, and the plurality of dust removal partition plates (22) are not interfered with each other.

2. An atmosphere roller kiln cooling device according to claim 1, characterised in that, The dust removal box body (21) is evenly distributed with a plurality of insertion grooves on the side wall in an up-down direction, and the dust removal partition plate (22) is inserted into the insertion groove. The top of the dust removal box body (21) is provided with a top cover (23), and the top cover (23) is detachably mounted on the top of the dust removal box body (21).

3. An atmosphere roller kiln cooling device according to claim 1, characterized in that, The cooling assembly (1) comprises a cooling box body (11), and a cooling medium inlet (12) and a cooling medium outlet (13) are arranged through the side wall of the cooling box body (11).

4. An atmosphere roller kiln cooling device according to claim 3, characterised in that, The cooling medium inlet (12) is located below the cooling box body (11), and the cooling medium outlet (13) is arranged above the cooling box body (11). The cooling medium is the process gas of the atmosphere roller kiln.

5. An atmosphere roller kiln cooling device according to claim 3, characterised in that, The cooling box body (11) is provided with a conduction device (15). One end of the conduction device (15) is communicated with the cooling medium inlet (12), and the other end is communicated with the cooling medium outlet (13).

6. An atmosphere roller kiln cooling device according to claim 5, characterised in that, The conduction device (15) is a cooling pipe or a cooling clamp plate.

7. An atmosphere roller kiln cooling device according to claim 1, characterized in that, The air outlet pipeline (3) is provided with an extension pipe (33), and the extension pipe (33) is a flexible hose.

8. An atmosphere roller kiln cooling device according to claim 1, characterized in that, The air outlet pipeline (3) is provided with a pipeline adjusting valve (32) and a cooling adjusting valve (14), and the cooling adjusting valve (14) is arranged between the cooling assembly (1) and the fan (4).

9. An atmosphere roller kiln cooling device according to claim 8, characterised in that, The top of the roller kiln is provided with a plurality of air inlet cover plates (31), each air inlet cover plate (31) is provided with a plurality of air inlets (34), and the plurality of air inlets (34) are communicated with the air outlet pipeline (3). Each air outlet pipeline (3) communicated with the air inlet cover plate (31) is provided with a pipeline adjusting valve (32).

10. An atmosphere roller kiln cooling device according to claim 1, characterised in that, The bottom of the dust removal device (2), the cooling assembly (1) and the fan (4) is provided with a supporting part (5), and the dust removal device (2), the cooling assembly (1) and the fan (4) are fixed on the top of the roller kiln through the supporting part (5). The bottom of the supporting part (5) is provided with a damping block.

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